Has anyone gained any more insight on the DS tuner. I purchased one yesterday and this thread died in 2016.
The good thing about their systems is that the owner can change some of the simple parameters themselves (fan settings, tire diameter, etc.), with only the device, and no need to involve a tuner (at least that was the case when I had one for my LS1 Z28, I don't know if it functions the same way with the modern, O.A.R. Ford ECMs).
The BAD news is that in order to get a CUSTOM tune, or to change an existing custom tune, one MUST go to (or do the email tune thing from) one of their CMR tuners ONLY (which are VERY far and few between
).
You also cannot store a tune from any other FiST tuners on their device, as can be done with the Cobb AP system.